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1. (WO2017034408) DC SWITCH YARD AND METHOD TO OPERATE SUCH A DC SWITCH YARD

Pub. No.:    WO/2017/034408    International Application No.:    PCT/NL2016/050594
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Sat Aug 27 01:59:59 CEST 2016
IPC: H02H 7/26
H02J 3/00
H02H 3/06
Applicants: TECHNISCHE UNIVERSITEIT DELFT
Inventors: MACKAY, Laurens Johannes
KONTOS, Epameinondas
Title: DC SWITCH YARD AND METHOD TO OPERATE SUCH A DC SWITCH YARD
Abstract:
DC switch yard (1) comprising at least two busbars (2, 3) and two or more DC lines (5 - 8) forming a grid, wherein each DC line (5 - 8) is connected or connectable to said at least two busbars (2, 3) through an intermediate circuit breaker, wherein the at least two busbars (2, 3) are interconnected or connectable to each other through an intermediate main circuit breaker (4), and wherein each of said two or more DC lines (5 - 8) are connected or connectable to each of said at least two busbars (2, 3) through intermediate fast disconnectors. The switch yard is arranged to operate such that upon identification of a DC line to be disconnected from the grid, one of the fast disconnectors of said DC line is operated to disconnect said DC line from a first of the two busbars, and disconnectors of the remaining DC lines are operated to disconnect said remaining DC lines from a second of the two busbars, whereafter the main circuit breaker is operated to disconnect the two busbars from each other. The main circuit breaker and preferably also the fast disconnectors are arranged with unidirectional breaking capability.